Recent content by Gregs6799

So I wasn't far off the right answer with 440000 x 0.1 = 44,000 8.314 x 298 = 2477.572 44000 / 2477.572 = 17.759 moles just didn't multiply by 29, which I didn't see in the given formula, unbelievable. Sorry for taking up much of your time, your either born with the brains or your not. Many...

I tried replacing (m/Mr) with n (moles) nRT 17.75 x 8.314 x 298 = 43976 (unless that's in grams is way too high.) And RT / PMr 8.314 x 298 / 44000 x 2478 = 139.53, again too high if its in kgs.

I think Mr = 44000 / 17.75 = 2478 and probably didn't put in the formula, not sure what units that would be in.

Homework Statement Homework Equations pV = (m/Mr)RT (this is the formula given but I got the wrong answer using it) The Attempt at a Solution Mass = PV / RT R = 8.314 P1 x V2 / R x T1 M = 220 x 0.1 / 8.314 x 298 = 788.549kg Mass = 788.549kg P = 440000 V = 0.1 R = 8.314 T = 298...

So pretending the hinge is at the top I've got: Iy (instead of Ix) = 1^3 x 0.5 / 3 = 0.166m Iy(0.166) + Ad^2 (0.5 x 0.5^2) = 0.291m

I'll have a look at that tomorrow, I've at work soon, thanks!

Yes both

No calculus either I'm afraid the notes are pretty much physics and very little math. But is bh^3 / 3 not along the right path? And something like: 1.00 x 0.5^2 / 3 + 1.00 x 0.5 x 025^2 = 0.1145m 0.1145 / 0.125 = 0.916m

My notes don't cover integration.

Sorry for the late reply I've got: H = 0.5 z = 0.5 d = 0.5 F = 1000 H - z = (0.5 - 0.5) = 0, d x F = 0.5 x 1000 = 500 z x d x z = (0.5 - 0.5) = 0, 0.5 x 0.5 x 0.5 = 0.125m Which is my 1st moment for the 2nd moment I've been told should be about the hinge so bh^3/ 3 = 0.0416 (not bh^3/12)...

(a) L = 1m H = 0.5m W = 0.5m Area = 1 x 0.5 = 0.5 Y = 0.5 / 2 = 0.25 1st moment of area = 0.5 x 0.25 = 0.125 Water thrust force F = p x g x 1st moment of area F = 1000 x 9.81 x 0.125 = 1,226.25N My correct answer for 1st moment.

Homework Statement A hinged water storage is shown below. Its top side is denoted as C, the narrow side as B and the long side as A. Assume water density is 1000 kg/m3 and gravity is 9.81 m/s2 Side A is hinged at the bottom edge and secured using a clasp at its top edge. Dimensions are: L =...

It's just the picture I have makes it look fairly small, but with the equations I've done it has to be the correct answer. Sorry it's taken so long but in my notes there's no examples with different values to compare and my tutor isn't easy to get hold of. Thanks again.

141,295.85g so 141kg which again seems so high

4879moles x 28.96 = 141,295.85 141,295.85 / 4879 = 28.96 Molecular mass = 28.96kg